If you don't have oat flour, just process 1 ½ cups oats in a food processor until you reach a smooth powder.
In a mediun bowl, add the pumpkin puree and the egg and mix everything until well combined. You can use a fork or a whisk.
Add the oat flour using a fine mesh colander to avoid any possible lumps.
Add the sugar, vanilla essence, baking powder, and salt and mix well until everything is well combined.
In a small pan, put a knob of coconut oil or butter and grease it evenly.
With the pan in medium heat, pour a big spoonful of the batter, form a round shape, and let it cook until you see the top gets dry. You can also use a circle mold to get perfectly round-shaped pancakes, in this case, you'll need to run a knife inside the borders to separate the batter from the mold.
Once one side is done flip it to cook the other side.
Make one by one and set aside until all of them are done.